Page 21 of 52
PG2021_SWC-V-ECM_02
I/O Port Definitions
I/O
Code
Description
Analogue
Input
Return air Sensor
AI1
Return air temperature (Tr)
Chilled water Sensor
AI2
Water inlet temperature sensor (Ti1)
Hot water Sensor
AI3
Water outlet temperature sensor (Ti2)
Input
IR receiver
X-DIS 1
Digital communication port to LED display/IR receiver board.
Wired wall pad
TTL1
Digital communication port to wired wall-pad board.
Digital input
Occupancy contact
ON/OFF
NO/NC contact by setting
Float switch
Float
Voltage-free (NC).
The contact is connected with float switch (NC).
Electrical heater safety
switch
EH
Voltage-free (NC).
The contact is connected with E-heater safeties.
Power input
Phase
L
Power supply to the PCB.
Neutral
N
Power supply to the PCB.
Earth
G
Power supply to the PCB.
Voltage output
Fan 1
CN4
Fan 1 driver
Valve1
MTV1
On/off valve
Valve2
MTV2
On/off valve
Water pump
WP
Voltage output (L), Power supply to condensate pump.
Electrical heater
Heat
Voltage output (L), maximum 10A.
Output
Stepping motor
CN1, CN2
Power supply to louver stepping motors.
Cooling free contact.
AUX1
Voltage free contact. Maximum load 5A.
Heating r free contact.
AUX
Voltage free contact. Maximum load 5A.
Modulating valve
control
DA1
0~10VDC
Modulating valve
control
DA2
0~10VDC
In Modbus signal
AB
Terminals for local network serial connection
Out Modbus signal
AB
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz
